Definition of doom. 1  1 : a law or ordinance especially in Anglo-Saxon England. 2  2a : judgment, decision; especially : a judicial condemnation or sentenceb (1) : judgment 5a (2) : judgment day 1. 3  3a : destiny; especially : unhappy destinyb : death, ruin.
In its native range Exacum affine is an annual or short-lived perennial and is suitable for permanent outdoor cultivation only in humid tropical and subtropical areas. Grown as a pot plant, this plant requires a well-drained, but moist potting mix. Exacum will tolerate good light but not direct sun.
A North American prairie native, blazing star bears spikes of white, rose, or purple flowers that attract butterflies. It's an excellent plant to add vertical accent to the perennial garden, and the blooms are ideal for cutting and drying.n fact, this is one of the most maintenance-free perennials you can grow: It resists heat, drought, deer, and rabbits. It's also a blooming machine, producing flat-topped clusters of yellow, orange, red, pink, or white flowers throughout the summer. Zones 3-9. 1  Learn more about yarrow in Plant Encyclopedia!